Adhesive applying and drying mechanism for sheets



E. P. SHELDON June 18, s,1929.

ADHESIVE APPLYING AND DRYING MECHANISM FOR SHEETS Filed Aug. 25, 1923 5 Sheets-Sheet E 2% n N June 18,192.9.l E. P. sHELDoN A l 1,717,416

ADHESIVE APPLYING AND DRYING MECHANISM FOR SHEETS 3 Sheets-Sheet 2 Filed Aug. 25, 1923 June 18,1929. E. P. sHl-:LDON

ADHESIVE APPLYING AND DRYING MECHANISM FOR SHEETS Filed Aug. 25, 1925 5 Sheets-Sheet FIG .5.-

.R` O T NM w ATTYs.

Patented June 18, 1929.`

UNITED g STATES EDWARD P. SHELDON, DROOXLYN, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS, TO R. HOE AND.CO.,='INC., OF NEWr YORK, N. Y., A CORPORATION OF NEW YORK.

ADHESIVE APPLYING AND DRYING .MECHANISM vFORSHEETS.

Application med August 25, 1923. Serial Ifo. 650,287.

This invention relates to certain improvements in machines for applying adhesive to sheets and for thereafter drying the gummed sheets.

These machines are used for applying adhesive to printed sheets, such for instance, as sheets of stamps, these gummed sheet-s being dried after the adhesive has been applied thereto.

In machines heretofore used for this purpose the drying of the gummed sheets has been effected by passing them through a drying chamber to which steam or hot air was admitted foi" ellecting the drying action. The drying action effected through these agencies was slow and required a drying chamber of such length that it was dillicult to inst-all a chamber in many plants and even where space could be provided the drying took up much space needed for other mechanisms.

It is the especial object of the present 1nvention to provide a machine for gumming and drying sheets in which the drying chamber is so arranged and heated that adi-'ying action is very uickly effected so that a drying chamber di small dimensions will adequately dr the sheets thus saving valuable space whic is of great importance in printing plants.

It is a further object of the invention to provide a gumming and drying machine having improved structural features.

With these and other objects not specifically referred to in view, the invention consists in certain novel parts, arrangements and combinations, which will be fully described in connection with the accompanying drawings, and the novel features thereof pointed out in the claims hereunto appended.

In these drawings- Figure 1 is a side elevation with the front frame removed and partly in section of the feed and gumming end of a gum applying machine the drier being shown in section and partly broken away.

Figure 2 is a similar view ofthe delivery end of the machine. y

' Figure 3 is a lan view partly in section of one end of the rier.

Figure 4 is a sectional view taken on line 4-4 of Fig. 3.

Figure 5 is a detail sectional view of certain supports employed in the drier.

Referring now to these drawings, the parts side at its head and tail.

of the mechanism vwill be supported in side i frames both of which mark 1 are shown in the drawings. 4 i

The machine illustrated includes the usual slopin feedboard 2 down which the sheets are fe against a front stop 3. The sheets to be gummed arel carried through the an drying mechanism by means o a travelling carrier shown as a pair of chains 4; 5 which pass over a driving sprocket 6 mounted on a shaft 7 suitably journaled in the frame of the machine at one end and over a sprocket ming 8 on a shaft 9 suitably journaled in the mav chine frame at the delivery end.

These carrier chains are provided with sheet taking devices which take the sheetzmd carry it in a flat position through the gumming and dryin` mechanism to the delivery end of the machine these sheet taking devices being arranged so as to take the sheet'on eachv While these sheet taking devices may be of variouscharacters, in the particular construction illustrated they are in the form of grippers which are mounted on "gripper frames 10 carriedb the chains.

These grippers comprise a fixed )aw 11 and a movable jaw 12, the movable jaw beingoperated from a cam roll 18 which co-operates with a suitable cam to open and close the grippers to take and release the sheets.

These grippers take the sheets from the feedboard andl carry the sheets beneath the gumming mechanism which includes a umming roll 14 to which gum is supplied rom a fountain 15, thegum applying roll 14 working a ainst an abutment in the `form of a cylin er 16 suitably mounted on a shaft 17 supported in the side frames of the machine.

After the adhesive is applied to the sheet the sheet is carried by the grippers through the drying mechanism which is located closely adjacent the gumming devices. In accordance with the inventionthis drier is constructed so as to e'ect a quick drying of the gummed sheet so that the spacerequired by the drier may be minimized as far as possible, and to effect this-f the drier is provided with .electrical heating units over which the sheet isA passed flatwise under the control of ,the ippers. While the' specific construction ogrt e drier and the y type of electrical heating units employed l to, as b means of flanges 23 'through whichy vpass bo ts 24 in the frames.

trated, the drier is in the form of a rectangular chamber 18 of metal, the walls of which are or may be covered with heat insulating materialias asbestos, indicated by Extending through the drier are supporting beams 25 and extending beneath the drier arev small supporting beams 26, three 'of these latter being shown. These supporting beams are or may he mounted in any 'su1table manner. In the particular conv'struction illustrated they are supported from hanger plates 27 carried on rods 28 and 29 suitably supported adjacent the front and rear ends of the drier in the side frames, before referred to. In the best constructions the upper pair of beams 25 extend beyond the drier at each side, as yindicated at 30, 31 in Figs. 1 and 2, and these u per beams are', T-shaped in cross-section orming in effect a track. VThese beams thus rovide a surface on which may ride rounded) portions 32 onA the chains and prevent the chams from sagging as they pass under the gumming mechanism through the drier and to the delivery end of the machine.

In accordance with the invention electrical heating elements are provided for heating the drier so as to effect a rapid drying of the gummed sheet. While these means may be varied somewhat, in their best arrangement these means will belocated inside the drier and in the preferred embodiment of the invention comprise preferably a series of plates 33, two of these plates being shown, these plates being connected to a suitable source of electricity by a line circuit indicated by the wires 34, 35. These plates extend across the drying chamber preferably substantially the length of the drying chamber, and there is thus arranged a Wide heatin surface by which a very rapid drying o the gummed sheet takes place' and consequently the space re uired by the drying chamber is greatly re uced. The plates may be supported in the chamber 1n any suitable manner. In the particular construction illustrated, these lates are supported on brackets 36 secure to the supporting beams 25, before referred to, the feet 37 of the brackets passing inwardly toward each other, as shown in Fig. 4. The plates are rovided with projections 38 which rest on t e feet of thebrackets, being suitably insulated therefrom.

After the sheets leavel the drier they' are delivered from the machinein any suitable manner. In the best constructions there is sheet is bent or turned so as to smooth out the sheet and prevent the gummed sheet from rolling. While the particular construction for effecting this may' be varied, as illustrated thei head of the sheetsV on being released bythe front grippers passes into the control of a pair of forwarding rolls 39, 40 suitably mounted on shafts 41, 42 in the side frames of the machine.

These forwarding --rolls take the head of the sheet before it is released by the grippers so that the sheet is positively controlled. From the forwarding rolls the sheet passes between the sheet guides 43 and a bending plate 44, this bending plate having a downwardly extending lip 45. The sheet is forwarded over this bending plate until the front edge of the sheet projects a short distance beyond the lip 45. At this time a tucking blade 46 is caused to tuck the projecting end of the sheet into the bite of a pair of drawing off rolls 47 48 suitably mounted on shafts 49, 50, the shaft 49 being mounted in the side frame of the machine.

.These drawing olf rolls 47, 48 act to pull the sheet around the edge of the lip 45 and thus act to straighten the sheet so that it will not roll up when it is finally delivered.

The tucking blade may be operated in various ways. `In the particular Construction illustrated,l the tucking blade is operated by an arm 5l mounted on an arm 52 pivoted at 53 in the frame of the machine. The lower end of this arm is provided with a cam roll 54 which is actuated by a cam 55 (See Fig. 2) on a shaft 56. To rock the arm and cause the tuckin blade to force the end of the sheet into t e bite of the rolls 47 48, the roll 48 is or may be as shown carried on the arm 52 so that when the arm is in its out position a clear space is left for directing the end of the sheet between the rolls.

The dried and straightened sheet passes the rolls 47 48 to a final delivery, which may be the ordinary y delivery indicated at 57, the sticks of this delivery delivering the sheets into the usual box 58.

The various parts of the mechanism may be driven in any usual or'suitable manner. Referring to Fi 1 and 2 there is shown a main power sha t 60 driven from any suitable source of power, not shown, the shaft of which is provided with a gear 61. This gear meshes with a gear 62 which, in turn meshes with a ear 63 on the sprocket wheel 6, thereby drivlng this sprocket. The ear 62 also meshes with a ear 64 on the s aft 17 of the abutment rol 16, before referred to, driving this roll and this gear 64 also drives through a gear 65 the gumming applying roll 14, before referred to. 'Ihe shaft 9 of the sprocket wheel 8 is provided'with a gear 66 which meshes with an intermediate 67. This intermediate is in mesh with a gear 68 on the roll shaft 41-`and with a gear 69 on the roll shaft 49 whereby these two rolls are driven. The shaft 9 also is provided with a gear 70 which meshes with an inter-- effective drying of the sheet.

While the invention has been shown and described in its preferred form, itwill be understood that various changes may be made in the arrangement and construction of the different parts and that various types of electrical elements' may be employed in the drier without departing from the invention set forth in the claims hereunto annexed.

l/Vhat I claim is:

1. The combination of'a travelling sheet carrier having means for holding a .sheet to which an adhesive has been applied, forwarding rolls engaging the sheet before the sheet holding means entirely release it, a bending plate over which the sheet is drawn, and a delivery.

2. The combination of a travelling sheet carrier having means for holding a sheet to which an adhesive has been applied, a bending plate over which the sheet is drawn,and a pair of drawing rolls below and closely adjacent the plate for drawing the sheet, one of these rolls being mounted to swing toward and away from the other.

3. The combination of a travelling sheet carrier having means for holding a sheet to which an adhesive has been applied, a plate having a bending lip, and a pair of drawing oii rolls below the plate acting to draw the sheet over the bending lip.

4. The combination o a travelling sheet carrier having means for holdin@ a sheet to which an adhesive has been applied, a bending plate, a pair of drawing 0E rolls acting to draw the sheet over the bending plate, and

a tucking blade for tucking the end of the sheet into the bite of the rolls.

5. The combination of a travelling sheet carrier having means for holding a sheet to which an adhesive has been applied, a pair of rolls to which the sheet is delivered from the holding means, a bending plate, a pair of drawing off rolls acting to draw the sheet over the plate, and means for directing the end oi the-sheet into the bite of the drawing oli' rolls.

6. The combination of a travelling sheet carrier having means for holding a sheet to which an adhesive has been applied, a bending plate, a pair of drawing off rolls below and adjacent the plate and acting to draw the sheet over the plate, a tucking blade for tucking the end of the sheet into the bite of the rolls, and means for etecting aseparation of one. of the rolls from the other.

In testimony whereof, I have hereunto .set my hand. v

IEDWARD P. sHELnoN.` 

